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Sins Forums
what programs do yall use to make ships and buildings and such. and how to get 
use harpo99999's convertor tools and notepad++\
https://forums.sinsofasolarempire.com/353296
link to harpo's converter tools
if you mean he meshes for the ships & structures, then you will need a 3d design program like 3dsmax etc, but there is a thread here in the modding area in the stickies for this exact area.
harpo
Check out [Tutorials] XSI 3D Modeling
Links to everything you need to get you started
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